Transfer Case Swap Info NP249->NP231 & NP242 - Page 106 - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Transfer Case Swap Info NP249->NP231 & NP242

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Unread 04-24-2013, 09:18 AM   #1576
bigb229
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1998 ZJ 
 
Join Date: Feb 2010
Location: ga
Posts: 679
so how much chain slack is too much slack? I get about a half inch of droop in mine and that's a bit much for my taste

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Unread 04-24-2013, 02:01 PM   #1577
denk72
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1995 ZJ 
 
Join Date: May 2012
Posts: 36
Im doing a front case swap. Since the 249 and 242 have the same front case the seals for the front input and front output are the same right?
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Unread 04-24-2013, 02:09 PM   #1578
denk72
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The same between the 249 and 242?
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Unread 04-25-2013, 08:18 AM   #1579
01blackout
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2000 XJ Cherokee 
 
Join Date: Jan 2010
Location: churubusco
Posts: 319
is there a new part number for that tcase linkage "bearing" the link on quadratec is no good anymore
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BLACK OUT 2001 60th anniversery TJ*4.0*soft 8's*33x12.5 dunlap mudrovers* kc daylighters*3.25 rough country suspension lift*d30*d44* BUILT NOT BOUGHT!!!!! (sold)
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Unread 04-25-2013, 10:00 AM   #1580
bigb229
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if you'll google np 242 parts/quadratec....it'll pop up the parts page and you'll see the listing for the bushing kit
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Unread 05-01-2013, 07:18 PM   #1581
AlphaLorde
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1998 ZJ 
 
Join Date: Jan 2010
Location: Forest Lake, MN
Posts: 718
I did my 231 swap, got my driveshaft shorted, replaced a ujoint and balanced.

I got harsh vibes while accelerating from 45mph up to about 52mph. But only gives vibes under power. If I'm coasting or holding a steady speed in that range i get no vibes. I also get a very slight vibe 65+.

I think my pinion bearing on my 44a has a slight amount slop in it. I can click/clink the pinion shaft around in the housing. Could this be casusing my vibes? Any help will be appreciated.
My pinion angle is within a degree of the tcase output.

I just hope that I dont have to bite the bullet and go sye. The positive side of it though is I already have a spare double cardan cv DS to use.
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1998 ZJ Laredo 5.2L 139k 231 w/SYE artec trussed 8.8 4.25"F/5"R lift
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Unread 05-02-2013, 07:29 PM   #1582
Palozo
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1998 ZJ 
 
Join Date: May 2013
Location: São Paulo, São Paulo/Brazil
Posts: 1
Good evening guys!

I have a GC Laredo 1998 4.0, 4-speed automatic gearbox, and NP 249 T-Case. I live in Brazil, so my apologies for my bad English.
Some time ago I was thinking about fuel saving. You know Brazilian gasoline is no much better than piss granny (grannies pardon-moi!). So here there are some solutions used by Brasiilians owners since 20 years ago (or more).

1-Convertion a gasoline engine to alcohol engine.
Expensive conversion. Engine must be over compressed. Normally from 8.9:1 to 11.0:1 to burn alcohol efficiently. Sometimes the ECU must be reprogramming or changed. No way for Cherokees or other car from USA Europe or Japan market.

2-GNV installation. In this case car burns gasoline and/or GNV gas or alcohol and/or GNV gas. Anyway it's a expensive process too! Install GNV cylinders, new ECU, change spring (GNV cylinders are very weight!). Egines usually lose 15% in its BHP and fuel injector works over-heated.

My ideia is (just speculation) to install a T-Case wiht 2wd option. I drive 99% time in highway or cities. Never offroad. So a 2wd T-case would be welcome.
But I'm NOT sure about fuel saving with different T-case. I would need a comparisson between 2wd and 4wd performance on highway. Can someone help me?

Thanks

Palozo
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Unread 05-02-2013, 07:39 PM   #1583
comptiger5000
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1998 ZJ 
 
Join Date: Jan 2009
Location: Stamford, CT / Rochester, NY
Posts: 4,357
Unless you install hub lockouts on the front hubs, running in 2wd vs 4wd doesn't affect gas mileage. All the 4wd bits are still spinning, just with no power applied. If you got hub lockouts for the front (not cheap), you'd probably gain about 0.5 mpg from reduced drivetrain friction when in 2wd.

By the way, your English is actually not bad at all. I see far worse on a regular basis from people who've spoken English from birth.
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Unread 05-02-2013, 10:38 PM   #1584
love2offroad
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1994 ZJ 
 
Join Date: Apr 2013
Location: Pleasant Grove, Utah
Posts: 78
I'm new to the jeep forum and want to build my first crawler, but want to use it as a daily driver as well. To start off, I have a 94 Grand Cherokee (build date 10/93). The transfer case in it is the notorious 249, although the date of the transfer case that is in it says "3 27 96 3". According to what was stated earlier in this thread tells me this was manufactured march 27 of 1996. What i want to know is will the output shaft be the .840 like the 96-98 should have like stated above, or will i have the 1.55" like the 93-95 V8 should have? Any input would be much appreciated. For reference though, I want to swap to a 231 transfer case. Thoughts? Things i should worry about?
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Unread 05-08-2013, 04:51 PM   #1585
JArnett0913
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1994 ZJ 
 
Join Date: Dec 2012
Location: Southwest City, MO
Posts: 2
Hi,I have a question for you guys on the swaps.Is it a direct swap from an NP249 to an NP231 or do I need to change the front case halves?I have the driveshafts and everything from the donor jeep.I have a 94' Grand Cherokee Laredo with the 318 V8 and the donor NP231 is coming out of a 93' Grand Cherokee Laredo with the Inline 6.I actually own both jeeps but the 93' is a parts jeep.Thanks,Johnny.
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Unread 05-10-2013, 01:56 PM   #1586
speedbucket
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Quote:
Originally Posted by JArnett0913 View Post
Hi,I have a question for you guys on the swaps.Is it a direct swap from an NP249 to an NP231 or do I need to change the front case halves?I have the driveshafts and everything from the donor jeep.I have a 94' Grand Cherokee Laredo with the 318 V8 and the donor NP231 is coming out of a 93' Grand Cherokee Laredo with the Inline 6.I actually own both jeeps but the 93' is a parts jeep.Thanks,Johnny.
the answers to that are all in this thread but im feeling generous
you will need to use the input off of your 249 (its 1.55" exposed)
the I-6 input shaft is not long enough.
you will use everything from the 231 but the input shaft
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http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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Unread 05-10-2013, 04:17 PM   #1587
JArnett0913
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Thanks speedbucket for being so generous and I mean that sincerely.I wasn't quite sure about it and didn't feel like reading 100 plus pages too many things to do and never enough time.
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Unread 05-13-2013, 04:35 PM   #1588
mandrews000
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1997 ZJ 
 
Join Date: Feb 2012
Posts: 373
Finally got around to fitting the 231 in... Forgot to change the input shaft though... That's what happens to a project that's been open for over 6 months.

Turns out the 231 my brother gave me, which was supposedly a 95, is actually a late 93... This complicates things...
image-217728499.jpg   image-4190036707.jpg  
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Unread 05-14-2013, 08:04 PM   #1589
StevieB76
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1995 ZJ 
 
Join Date: May 2013
Location: Osburn, Idaho
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Ok, so if I am understanding correctly..since my 95 ZJs(4.0l) NV249 has a build date of 1-27-95 and has an internal slip yoke it has a .840" 23 spile input. If I wanted to switch to a NV242 I would be looking for one with a 95 or newer build date from a 95-01 XJ...if I am understanding correctly?
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Unread 05-15-2013, 11:10 AM   #1590
speedbucket
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Quote:
Originally Posted by StevieB76 View Post
Ok, so if I am understanding correctly..since my 95 ZJs(4.0l) NV249 has a build date of 1-27-95 and has an internal slip yoke it has a .840" 23 spile input. If I wanted to switch to a NV242 I would be looking for one with a 95 or newer build date from a 95-01 XJ...if I am understanding correctly?
That build date is gonna be a crap shoot on the new gear cut vs. Old gear cut.
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V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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